Probing the diffractive production of a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>-boson pair at forward rapidities at the LHC

Sun, H.

doi:10.1103/physrevd.95.056023

Phys. Rev. D

2017

DOI: 10.1103/physrevd.95.056023

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Probing the diffractive production of aZ-boson pair at forward rapidities at the LHC

H. Sun

Abstract: In this paper, we present the results from phenomenological analysis of Z boson pair hard diffractive production at the LHC. The calculation is based on the Regge factorization approach. Diffractive parton density functions extracted by the H1 Collaboration at DESY-HERA are used. The multiple Pomeron exchange corrections are considered through the rapidity gap survival probability factor. We give numerical predictions for single diffractive as well as double Pomeron exchange cross sections and compare with the… Show more

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Cited by 3 publications

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“…To reach this new realm of interest, detectors in the LHC tunnel need to be readjusted so as to precisely measure very forward hadrons. The setting-up of forward detectors at LHC may permit to predict the single diffraction and double pomeron exchange cross sections [40] which are important for future measurements at the LHC, may endow the likelihood to open a new window to investigate new physics even up to TeV scale [41][42][43][44] with extremely clean environment, and may enable to tag forward hadron or nucleus in photon-hadron and photon-nucleus collisions at high rapidity regions. It may also offer knowledge about unexplored phase space areas.…”

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Photoproduction of J/ψ with forward hadron tagging in hadronic collisions

2019

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We study the photoproduction of J/ψ using the NRQCD formalism with forward hadron tagging at the Large Hadron Collider. We estimate the total cross sections and event rates with and without nuclear shadowing effects in high energy proton-proton, proton-nucleus and nucleus-nucleus collisions. Our results show that the processes which involve J/ψ photoproduction depend on the choice of forward detector acceptances ξ. Under some precise cut of p J/ψ T and z J/ψ kinematic variables, we find that the distributions of photoproduction of J/ψ are led by the Fock state 1 S1 . The total cross sections and event rates will be smaller if the nuclear shadowing effects are considered. The processes give a crucial photoproduction signature at the LHC with forward detector acceptances. The exploration and the detection of the interactions will be useful for studying the mechanism of heavy quarkonium production. I. INTRODUCTIONSince the discovery of heavy quarkonia in the mid-1970s, their production and decay become reliable tools to improve our understanding of theoretical aspects of quantum chromodynamics (QCD) from the hard region, where the strong interaction is realized with a large momentum transfer, to the soft region, where the strong interaction is carried out with a small momentum transfer. These production and decay of heavy quarkonia are studied under the non-relativistic quantum chromodynamics (NRQCD) due to the large mass of heavy quarks (m c ∼ 1.5 GeV, m b ∼ 4.75 GeV). The full description of the theoretical framework was proposed by Bodwin, Braaten and Lepage(BBL) [1]. It factorizes the quarkonium production in terms of short distance QCD cross sections and long distance matrix elements (LDMEs). The former can be pertubatively evaluated in series of the running coupling constant α s while the latter is the probability for a heavy QQ pair with spin S, orbital angular momentum L, total angular momentum J, and color multiplicity a = 1 (color-singlet), 8 (color-octet) to evolve into a physical heavy quarkonium state. The value of LDMEs can either be calculated by utilizing non-perturbative methods or extracted phenomenologically from data [2], i.e., QCD lattice simulations or measurements in some production processes. The QQ pair is generated from the partonic interaction at short distances in color singlet (CS) or in color-octet (CO) states and hadronizes into physical CS observable by emitting soft gluons non-perturbatively. The effect of LDME contribution has a hierarchically ordered scaling with v [3], v being the nonrelativistic velocity of Q orQ in the QQ rest frame. The essence of this theory can now be systematically shortened by the double expansion in powers of α s and v. A lot of phenomenological approaches of this framework are meticulously narrated in Refs [4,5,7,8], taking into account the complete and spanned structure of the QQ Fock space by the state n = 2S+1 L (a) J . However, the golden age of the NRQCD theory has been to address the limitations of the early proposed models from which it establishes...

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Photoproduction of J/ψ with forward hadron tagging in hadronic collisions

2019

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Hard diffractive ηc,b hadroproduction at the LHC

2020

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In this paper, we investigate the inclusive diffractive hadroproduction for ηc and η b at the LHC energies. Based on the NRQCD factorization formalism and the resolved-Pomeron model for the quarkonium production mechanism, we estimate the rapidity, momentum fraction loss dependence of the cross section. We give prediction ratios for single and central diffractive processes with respect to non diffractive process. These inclusive processes are sensitive to gluon content of Pomeron for small-x and Reggeon for large-x, useful to study small and large-x physics and good to test different mechanism for ηc and η b production at the LHC. They also serve as the background to related exclusive processes thus should be predicted. Our results demonstrate that the Reggeon contribution of diffractive processes can be sizable, even sometimes dominant over Pomeron, and that its study can be useful to better constrain the Reggeon parton content. The experimental study of Reggeon can be carried out in certain kinematic windows.

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Inclusive diffractiveηcproduction in pp, pA, and AA modes at the LHC

2020

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Probing the diffractive production of aZ-boson pair at forward rapidities at the LHC

Cited by 3 publications

References 69 publications

Photoproduction of J/ψ with forward hadron tagging in hadronic collisions

Photoproduction of J/ψ with forward hadron tagging in hadronic collisions

Hard diffractive ηc,b hadroproduction at the LHC

Inclusive diffractiveηcproduction in pp, pA, and AA modes at the LHC

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